Simulation system for measuring transmission time of SpaceWire data packets

A technology of simulation system and transmission time, which is applied in the field of aerospace communication network simulation, can solve the problems of lack of simulation system and achieve the effect of increasing the time window

Active Publication Date: 2014-04-23
BEIHANG UNIV
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Problems solved by technology

[0004] Protocol simulation based on software to simulate the SpaceWire network communication mechanism, measure the end-to-end delay of event-triggered message transmission in the SpaceWire network, and lack a simulation system based on time-triggered messages and plan the scheduling schedule of wormhole routers

Method used

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  • Simulation system for measuring transmission time of SpaceWire data packets
  • Simulation system for measuring transmission time of SpaceWire data packets
  • Simulation system for measuring transmission time of SpaceWire data packets

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Embodiment 1

[0110] like Figure 5 Shown is a schematic diagram of the simulation results. Among them, the circle "○" represents the transmission time of the SpaceWire data packet triggered by time, and the circle represents the transmission time of a time-triggered SpaceWire data packet; the five-pointed star "☆" represents the transmission time of the SpaceWire data packet triggered by the event, and a five-star In the form of an event triggering the transmission time of a SpaceWire packet.

[0111] It can be seen that in the 1.6s simulation period, a total of 20 times are measured to trigger the transmission time of the SpaceWire data packet, all of which are 200ms (that is, 2×10 -4 s); a total of 19 event-triggered SpaceWire packet transmission times were measured (respectively 200ms, 200ms, 200ms, 856ms, 200ms, 402ms, 200ms, 500ms, 200ms, 200ms, 490ms, 200ms, 200ms, 680ms, 200ms, 200ms, 200ms, 200ms, and 200ms). It can be seen that the transmission time of the time-triggered SpaceW...

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Abstract

The invention discloses a simulation system for measuring the transmission time of SpaceWire data packets. The simulation system comprises a wormhole router module (1) with a time window, a time main control node module (2) and a terminal application node module (3), wherein the three modules construct an aerospace communication network on the basis of SpaceWire bus standard communication; the terminal application node module (3) is used for generating two types of SpaceWire data packets; the transmission time and transmission delay time of the data packets are counted in the wormhole router module (1) with the time window through simulation system synchronizing time provided by the time main control node module (2). The simulation system is used for measuring the transmission time and transmission delay time of the SpaceWire data packets on the basis of a SpaceWire bus standard, and the performance of the aerospace communication network can be improved by using the obtained time information.

Description

technical field [0001] The invention relates to the simulation field of aerospace communication network, more particularly, refers to a simulation system for measuring the transmission delay of SpaceWire data packets. Background technique [0002] SpaceWire (translated as space bus) bus is a serial, high-speed, point-to-point, full-duplex spaceborne data network standard (ECSS-E-ST-50-12C, 31July2008), which is a multi-source, asynchronous, event-triggered communication Network, it is difficult to guarantee the end-to-end delay of message transmission. If the message attributes of some nodes in the network are known in advance, such as time, size and other information, their transmission is planned and scheduled according to a fixed time window, a time-triggered message network can be formed, and the speed of message transmission in the network can be greatly improved. Certainty. [0003] The end-to-end delay of SpaceWire data packet transmission is a very important measur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26
Inventor 何锋代真熊华钢韩煜王琪
Owner BEIHANG UNIV
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